These are the consequences of sleeping with a… See more

insulin resistance.
Use of certain medications:  some drugs, such as corticosteroids or high-dose birth control pills, can promote their appearance.
Other medical conditions:  In rare cases, it may be associated with endocrine problems or even certain types of tumors.
Can flaxen also have it?
Yes. Acanthosis nigricans is not exclusive to adults. It is increasingly being detected in children and adolescents, especially those who are overweight or  obese . In these cases, the presence of dark patches is considered an important indicator for assessing the risk of type 2 diabetes at an early age, something that was very uncommon decades ago but is now observed more regularly.
Consult a Dermatologist
Foot disordersWhat should you do if you notice these spots?
If you notice dark, velvety patches on your neck, armpits, or other body folds that don’t disappear with regular hygiene, it’s best  to consult a healthcare